Organic photochromic compounds have attracted significant attention for their potential applications in optoelectronic devices such as photoinduced molecular switches.We designed new ultrafast molecular switches by the transformation of spiro[indole-2,3'-naphth[2,1-b]pyrans] 1  to the compounds cis/trans-2  , possessing the rigid bridged naphth[1',2':6,7[1,3]oxazepino[3,2-a]indole ring system. Nanosecond flash-photolysis measurements on a new type of photochromic molecules 2  have been performed. Irradiation of 2  solutions in acetonitrile with nanosecond laser pulses (355 nm wavelength) has yielded a cleavage of the C-O bond and subsequent formation of the 6-nitro-2-naphtholate chromophores 3  (absorption peaks at 430 and 515 nm), which reverted back thermally to their initial state 2  within tens of nanoseconds.

3-Nitro-7a,15-methanonaphth[1',2':6,7][1,3]oxazepino[3,2-<i>a</i>]indoles as new ultrafast photochromic switches

243rd National Meeting (2012)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.

3-Nitro-7a,15-methanonaphth[1',2':6,7][1,3]oxazepino[3,2-a]indoles as new ultrafast photochromic switches